As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EVIDENCE OF AIR LEAKAGE AT 2L WINDOW AT FL320 CRUISE FLIGHT FOR 15 MINUTES. HIGH PITCH SQUEAL NOTED MID AFT SIDE OF WINDOW, THROUGH FL 220 SOUND WENT AWAY. EIGHT PSI DIFFERENTIAL PRESSURE, AIRCRAFT HAD AN AIR TURNBACK. REPLACED WINDOW AND SEAL PER MM 56-11-02 OPS AND LEAK CHECK GOOD.